Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Bohr Model246Choose the best answerBesides hydrogen, Bohr’s model is applicable to which species?AHe⁺ and Li²⁺BHe²⁺ and Li⁺CNa⁺ and Mg²⁺DAll multi-electron species Like 1 Discuss 0Share
Atomic StructureIsoelectronic Species247Choose the best answerWhich pair of ions is not isoelectronic?AMn²⁺, Fe³⁺BFe²⁺, Mn²⁺CO²⁻, F⁻DNa⁺, Mg²⁺ Like 0 Discuss 0Share
Atomic StructureAufbau Principle248Choose the best answerWhich principle states that electrons occupy lower-energy orbitals before higher-energy orbitals?APauli exclusion principleBAufbau principleCHund's ruleDHeisenberg uncertainty principle Like 0 Discuss 0Share
Atomic StructureMagnetic Quantum Number and Orbital Orientation249Choose the best answerAn orbital has quantum numbers n = 2, ℓ = 1 and mℓ = 0. It is commonly represented as:A1sB2sC2pₓD2pz Like 4 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Quantum Numbers250Choose the best answerWhich set of quantum numbers is not allowed?An = 0, ℓ = 0, mℓ = 0, ms = +½Bn = 1, ℓ = 0, mℓ = 0, ms = −½Cn = 2, ℓ = 1, mℓ = 0, ms = +½Dn = 2, ℓ = 0, mℓ = 0, ms = −½ Like 0 Discuss 1Share1